A new ocean going ship of 2000 gross tons having an inoperative oily water separator may dispose of its bilge slops by （）. ["holding its slops onboard until they can be pumped into the city sewer system","circulating them through the lube oil purifier to remove water and debris","holding its slops onboard until they can be discharged to a shore side reception facility","pumping them into a settling tank for separation before pumping the oily water residue overboard"]
生物多样性的主要层次包括：（） ["物种多样性","种群多样性","群落多样性","生态系统多样性","遗传多样性"]
位置开关的文字符号是（）。 ["SQ","SA","SK","SB"]
西印度群岛包括哪些范围？
下图所示的电路是不是点、连动控制线路（） ["不是","是","不能确定","是一般的开关控制电器线路"]
西印度群岛何以得名？它在经济发展上有什么特色？
